中国电力 ›› 2014, Vol. 47 ›› Issue (5): 25-28.DOI: 10.11930/j.issn.1004-9649.2014.5.25.3

• 电力安全专栏 • 上一篇    下一篇

电网瞬时故障时汽轮机汽门快控误动作原因分析

张宝1, 杨涛1, 项谨1, 樊印龙1, 顾正皓1, 徐峰2, 刘晓晟1   

  1. 1. 国网浙江省电力公司电力科学研究院,浙江 杭州 310014;
    2. 浙江浙能乐清发电有限责任公司, 浙江 乐清 325609
  • 收稿日期:2013-10-09 出版日期:2014-05-31 发布日期:2015-12-21
  • 作者简介:张宝(1978-),男,安徽界首人,硕士,高级工程师,从事汽轮机控制与节能技术工作。E-mail: ah_zb@126.com

Cause Analysis on Steam Turbine Valve Control Misoperation during Grid Instantaneous Faults

ZHANG Bao1, YANG Tao1, XIANG Jin1, FAN Yin-long1, GU Zheng-hao1, XU Feng2, LIU Xiao-sheng1   

  1. 1. Zhejiang Electric Power Research Institute of State Grid Corporation, Hangzhou 310014, China;
    2. Zheneng Yueqing Power Generation Co., Ltd., Yueqing 325609, China
  • Received:2013-10-09 Online:2014-05-31 Published:2015-12-21

摘要: 介绍几起电网瞬时故障时汽轮机汽门快控误动作事件,结合电网故障时的录波数据,对几种不同型式的功率变送器进行测试。结果表明,输入信号快速变化时,某些功率变送器输出值会发生畸变,畸变的方向与幅值跟何相故障、故障时刻、功率变送器接线型式与生产厂家有关,电网故障信息可能被放大,这是造成诸多机组汽门快控功能误动作的根本原因。根据测试结果,对功率变送器的选择和使用提出相关建议。

关键词: 汽轮机, 汽门快控, KU功能, PLU功能, 功率变送器

Abstract: In this paper, several steam turbine fast valve control misoperation events caused by grid instantaneous failures are introduced. In combination with the grid fault record data, several power transmitters of different types are tested. The result shows that when the input signal changes rapidly, distortion happens in the output value of some power transmitters with the distortion direction and amplitude relevant to the phase of faults, fault time, power transmitter connection type and the manufacturer such that the grid fault information may be amplified, which is the root cause of the fast valve control misoperation events. Based on the test results, some suggestions are put forward on the selection and application of power transmitters.

Key words: steam turbine, fast valve control, transient grid interruption (KU), power load unbalance (PLU), power transmitter

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